﻿using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Tunnel.Tools.FcmsSupport
{
    public class ConnectIF
    {
        private ushort[] crc_table = new ushort[] {
            0, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
            0x1231, 0x210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
            0x2462, 0x3443, 0x420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
            0x3653, 0x2672, 0x1611, 0x630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
            0x48c4, 0x58e5, 0x6886, 0x78a7, 0x840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
            0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0xa50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
            0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0xc60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
            0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0xe70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
            0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0xa1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
            0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x2b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
            0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x481, 0x7466, 0x6447, 0x5424, 0x4405,
            0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
            0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x8e1, 0x3882, 0x28a3,
            0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0xaf1, 0x1ad0, 0x2ab3, 0x3a92,
            0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0xcc1,
            0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0xed1, 0x1ef0
         };
        
        private SerialPort serialport;

        public void dispose()
        {
            //this.lc.LongConnectDispose();
        }

        public static bool find02(byte x)
        {
            return (x == 2);
        }

        public static bool find03(byte x)
        {
            return (x == 3);
        }

        public static bool find1B(byte x)
        {
            return (x == 0x1b);
        }

        public bool Get_CRC_Checked(ref List<byte> buffer)
        {
            try
            {
                ushort num = 0;
                for (int i = 1; i < buffer.Count; i++)
                {
                    num = (ushort)(this.crc_table[((num >> 8) ^ buffer[i]) & 0xff] ^ (num << 8));
                }
                List<byte> collection = new List<byte>();
                byte[] bytes = BitConverter.GetBytes(num);
                for (int j = 0; j < bytes.Length; j++)
                {
                    collection.Add(bytes[j]);
                }
                collection.Reverse();
                if (collection.Count != 2)
                {
                    return false;
                }
                buffer.AddRange(collection);
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        

        public bool JX_CloseDev(ref SerialPort port, string portname)
        {
            try
            {
                port.Close();
                if (!port.IsOpen)
                {
                    return true;
                }
                return false;
            }
            catch
            {
                return false;
            }
        }

        public bool JX_EscapeString(ref List<byte> raw_list, int indextobegin)
        {
            try
            {
                int startIndex = indextobegin;
                int num2 = 0;
                do
                {
                    num2 = raw_list.FindIndex(startIndex, new Predicate<byte>(ConnectIF.find1B));
                    if (num2 == -1)
                    {
                        break;
                    }
                    startIndex = num2 + 1;
                    raw_list[num2] = 0x1b;
                    raw_list.Insert(num2 + 1, 0);
                }
                while (startIndex < (raw_list.Count - 1));
                startIndex = indextobegin;
                num2 = 0;
                do
                {
                    num2 = raw_list.FindIndex(startIndex, new Predicate<byte>(ConnectIF.find02));
                    if (num2 == -1)
                    {
                        break;
                    }
                    startIndex = num2 + 1;
                    raw_list[num2] = 0x1b;
                    raw_list.Insert(num2 + 1, 0xe7);
                }
                while (startIndex < (raw_list.Count - 1));
                startIndex = indextobegin;
                num2 = 0;
                do
                {
                    num2 = raw_list.FindIndex(startIndex, new Predicate<byte>(ConnectIF.find03));
                    if (num2 == -1)
                    {
                        break;
                    }
                    startIndex = num2 + 1;
                    raw_list[num2] = 0x1b;
                    raw_list.Insert(num2 + 1, 0xe8);
                }
                while (startIndex < (raw_list.Count - 1));
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        public bool JX_GetFileSegment(ref List<byte> file, out List<byte> file_segment)
        {
            if (file.Count < 0x800)
            {
                file_segment = file;
                return false;
            }
            file_segment = file.GetRange(0, 0x800);
            file.RemoveRange(0, 0x800);
            return true;
        }

        public List<byte> JX_GetOffSetbytes(uint offset)
        {
            List<byte> list = new List<byte>();
            list.Add((byte)((offset & -16777216) >> 0x18));
            list.Add((byte)((offset & 0xff0000) >> 0x10));
            list.Add((byte)((offset & 0xff00) >> 8));
            list.Add((byte)(offset & 0xff));
            return list;
        }

        public bool JX_OpenDev(ref SerialPort port, string portname)
        {
            try
            {
                if (!port.IsOpen)
                {
                    port.PortName = portname;
                    port.BaudRate = 0x2580;
                    port.Parity = Parity.None;
                    port.DataBits = 8;
                    port.StopBits = StopBits.One;
                    port.ReadBufferSize = 0x4000;
                    port.ReadTimeout = 0x1388;
                    port.Open();
                }
                return true;
            }
            catch (Exception exception)
            {
                return false;
            }
        }

        

        public bool JX_ReceiveBySerialPort(ref SerialPort port, string portname, ref List<byte> rec_frame)
        {
            try
            {
                Thread.Sleep(0x1194);
                int num = 0;
                if (!port.IsOpen)
                {
                    return false;
                }
                byte[] buffer = new byte[0x898];
                num = port.Read(buffer, 0, 0x898);
                string str = Encoding.ASCII.GetString(buffer);
                for (int i = 0; i < num; i++)
                {
                    rec_frame.Add(buffer[i]);
                }
                return true;
            }
            catch (Exception exception)
            {
                return false;
            }
        }

        public bool JX_RecIsRight(ref List<byte> rec_frame, ref List<byte> rec_data)
        {
            try
            {
                rec_data.Clear();
                int count = rec_frame.Count;
                if ((rec_frame[0] == 2) && (rec_frame[count - 1] == 3))
                {
                    rec_frame.RemoveAt(count - 1);
                    if (this.JX_UnescapeString(ref rec_frame, 3))
                    {
                        int num2 = rec_frame.Count;
                        List<byte> list = new List<byte>();
                        list.Add(rec_frame[num2 - 2]);
                        list.Add(rec_frame[num2 - 1]);
                        rec_frame.RemoveRange(num2 - 2, 2);
                        if (!this.Get_CRC_Checked(ref rec_frame))
                        {
                            return false;
                        }
                        if ((rec_frame[num2 - 2] == list[0]) && (rec_frame[num2 - 1] == list[1]))
                        {
                            rec_data.AddRange(rec_frame.GetRange(3, num2 - 5));
                            return true;
                        }
                    }
                    return false;
                }
                return false;
            }
            catch (Exception)
            {
                return false;
            }
        }

        

        public bool JX_SendBySerialPort(ref SerialPort port, byte[] frame, string portname)
        {
            try
            {
                this.JX_OpenDev(ref port, portname);
                if (port.IsOpen)
                {
                    port.Write(frame, 0, frame.Length);
                    return true;
                }
                return false;
            }
            catch (Exception exception)
            {
                return false;
            }
        }

        public bool JX_UnescapeString(ref List<byte> escaped_list, int indextobegin)
        {
            try
            {
                int num = 0;
                int startIndex = indextobegin;
                while (true)
                {
                    num = escaped_list.FindIndex(startIndex, new Predicate<byte>(ConnectIF.find1B));
                    if ((num == -1) || (num == (escaped_list.Count - 1)))
                    {
                        break;
                    }
                    startIndex = num + 1;
                    escaped_list[num] += escaped_list[num + 1];
                    escaped_list.RemoveAt(num + 1);
                }
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }
    }
}
